Great fit, extra thickness on the shins where you lean against the ski boot, extra thickness on the heel and toes to keep them warm in the worst of the chill, and no seams to cause pressure points - not even at the toes. The length is good, right up under the knee on a six foot tall male. Feet seem not to get sweaty in them even on a long walk, so the breathe-ability must be good too. Best of all they never seem to ruckle up when putting on the boots, so again no pressure sores. The only modification I have done is to snip all the elastic at the top because I hate socks that grip too tight.
We've been using these Falke SK2 socks for a few years now, bought at our local ski shop Bartletts. They have survived many ski trips, long walking holidays, and many hand washes in delicate hair shampoo
. After shrinking a couple of pairs of Bridgedale walking socks to half size in the washing machine on a wool wash I'll never again risk these kinds of socks in a machine.
Buying in the shop was very useful because we were able to try them on to get the exact right sizes for our feet; 42-43 fits size 8-9 UK feet, neither tight nor loose.